In a manufacturing environment controlled with ISO14644-1 cleanroom classification, very small amount of particles sizes of 0.1 to 5µm (airborne particles) are detected, and particles sizes of more than 5 µm (macroparticles) detect as none or very few. However, when a cleanroom is on operation, many macroparticles can be found on every surface regardless of how clean the air is. Macroparticles cannot be vacuumed by air particle counters as they scatter in the direction of gravity, leaving the risk of contamination undetected. In addition, macroparticles are difficult to remove with airflow or filters. They accumulate and deposit on all surfaces. These particle can only be removed by proper cleaning.
APMON continuously monitors macroparticles that cause contamination risks to products and its manufacturing environment. APMON measures falling and depositing particles over 15µm every 5 minutes to detect "when" and "how" particles generated.
PartSens is a portable particle monitor that measures numbers and sizes of deposited particles in 10 seconds. It is the only instrument listed in VDA19.2, and allows to inspect in accordance to ISO14644-13, "cleaning of surfaces to achieve defined levels of cleanliness."
Contaminants adhere to vulnerable surfaces of products and environments by two mechanisms: “deposition (fall-out)” and “contact transfer” of particles. The risk level of the two mechanisms correlates to the degree of activities and low surface cleanliness levels in a cleanroom, such as poor execution of cleanroom procedures, unclean machinery, and tools. Therefore, risk control for products and environmental contamination means to control surface cleanliness levels and behaviors.
When the product quality is threatened, a sudden urge to monitor the air cleanliness level and to look into a microscope for clues occurs. However, this is not an adequate approach. As we have consulted various companies of different industries, we successfully managed to suppress such an urge for taking idea based measures. Our monitoring technique focuses on measuring the concentration of particles larger than the risk particle size and detecting improper behaviors during operations.
Continuously monitoring "surface cleanliness" and "particle deposition" and giving experimental changes to risk factors can identify behaviors of personnel, systems, and cleaning method that is highly effective for reducing unwanted particles. Intechno's consultation and education services encourage companies to take an innovative approach against contamination. Having improved product quality for various global companies, our services have been valued by the top executives of major companies.